Disclosed is an apparatus and a method for displaying 3D images, which do not need to be reversed, so that users can watch the 3D images without modification in a 3D image system. The 3D images display extracts characteristic information regarding a plurality of imaging devices from left and right images taken by the imaging devices, selects an image among the left and right images, determines a reference element in the selected image, determines a selection element corresponding to the reference element in the non-selected image; calculates a disparity value between the left and right images by using the reference element and the selection element, determines whether the left and right images are normal or not by using the disparity value, and corrects the left and right images based on the determination result.